As I entered the abandoned tunnels with Bourbon, I wondered if I'd been wrong to trust him. But the station gates were still sealed, and there was no telling when I'll have another chance to leave Riga.

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—Level description

Lost Tunnel is a short/medium length action level that starts after Artyom meets Bourbon and leaves Riga with him. This is the first level featuring lurkers (not including the one in chase) as well as human enemies - the bandits.

Contents

The level begins with Artyom and Bourbon moving down a derelict tunnel. As a guide, Bourbon will tell Artyom about the "singing pipes" and nearby lurkers. Should the player wish to take a side-trip they can break off from Bourbon and find two lurkers with some minor loot. Eventually the tunnel leads to a cave-in, and several dead caravaners. As Bourbon recognizes, this is the work of nearby bandits, and the only way past is through the camp. The two begin sneaking into the bandits' outpost and Bourbon teaches Artyom about traps, after which Bourbon kills a drunk bandit with a throwing knife, which Artyom can retrieve. Artyom alone must thenkill all of the bandits to continue.